7842 - new directory organization

Baremetal is now the default build target and therefore has its sources
at the top-level. Baremetal programs build using the phase-2 Mu toolchain
that requires a Linux kernel. This phase-2 codebase which used to be at
the top-level is now under the linux/ directory. Finally, the phase-2 toolchain,
while self-hosting, has a way to bootstrap from a C implementation, which
is now stored in linux/bootstrap. The bootstrap C implementation uses some
literate programming tools that are now in linux/bootstrap/tools.

So the whole thing has gotten inverted. Each directory should build one
artifact and include the main sources (along with standard library). Tools
used for building it are relegated to sub-directories, even though those
tools are often useful in their own right, and have had lots of interesting
programs written using them.

A couple of things have gotten dropped in this process:
  - I had old ways to run on just a Linux kernel, or with a Soso kernel.
    No more.
  - I had some old tooling for running a single test at the cursor. I haven't
    used that lately. Maybe I'll bring it back one day.

The reorg isn't done yet. Still to do:
  - redo documentation everywhere. All the README files, all other markdown,
    particularly vocabulary.md.
  - clean up how-to-run comments at the start of programs everywhere
  - rethink what to do with the html/ directory. Do we even want to keep
    supporting it?

In spite of these shortcomings, all the scripts at the top-level, linux/
and linux/bootstrap are working. The names of the scripts also feel reasonable.
This is a good milestone to take stock at.

1 files changed, 0 insertions, 133 deletions

diff --git a/apps/tile/main.mu b/apps/tile/main.mu
deleted file mode 100644
index e0daaf1b..00000000
--- a/apps/tile/main.mu
+++ /dev/null
@@ -1,133 +0,0 @@
-fn main args-on-stack: (addr array addr array byte) -> _/ebx: int {
-  var args/eax: (addr array addr array byte) <- copy args-on-stack
-  var len/ecx: int <- length args
-  compare len, 2
-  {
-    break-if-!=
-    # if single arg is 'test', run tests
-    var tmp/ecx: (addr addr array byte) <- index args, 1
-    var tmp2/eax: boolean <- string-equal? *tmp, "test"
-    compare tmp2, 0/false
-    {
-      break-if-=
-      run-tests
-      return 0  # TODO: get at Num-test-failures somehow
-    }
-    # if single arg is 'screen', run in full-screen mode
-    tmp2 <- string-equal? *tmp, "screen"
-    compare tmp2, 0/false
-    {
-      break-if-=
-      interactive
-      return 0
-    }
-    # if single arg is 'type', run in typewriter mode
-    tmp2 <- string-equal? *tmp, "type"
-    compare tmp2, 0/false
-    {
-      break-if-=
-      repl
-      return 0
-    }
-    # if single arg is 'test' ...
-    tmp2 <- string-equal? *tmp, "test2"
-    compare tmp2, 0/false
-    {
-      break-if-=
-      test
-      return 0
-    }
-  }
-  # otherwise error message
-  print-string-to-real-screen "usage:\n"
-  print-string-to-real-screen "  to run tests: tile test\n"
-  print-string-to-real-screen "  full-screen mode: tile screen\n"
-  print-string-to-real-screen "  regular REPL: tile type\n"
-  return 1
-}
-
-fn interactive {
-  enable-screen-grid-mode
-  enable-keyboard-immediate-mode
-  var env-storage: environment
-  var env/esi: (addr environment) <- address env-storage
-  initialize-environment env
-  {
-    render env
-    var key/eax: grapheme <- read-key-from-real-keyboard
-    compare key, 0x11/ctrl-q
-    break-if-=
-    process env, key
-    loop
-  }
-  enable-keyboard-type-mode
-  enable-screen-type-mode
-}
-
-fn test {
-  var env-storage: environment
-  var env/esi: (addr environment) <- address env-storage
-  initialize-environment-with-fake-screen env, 0x20, 0xa0
-  render env
-}
-
-fn process-all env: (addr environment), cmds: (addr array byte) {
-  var cmds-stream: (stream byte 0x100)
-  var cmds-stream-a/esi: (addr stream byte) <- address cmds-stream
-  write cmds-stream-a, cmds
-  {
-    var done?/eax: boolean <- stream-empty? cmds-stream-a
-    compare done?, 0/false
-    break-if-!=
-    var g/eax: grapheme <- read-grapheme cmds-stream-a
-    process env, g
-    loop
-  }
-}
-
-fn repl {
-  {
-    # prompt
-    print-string-to-real-screen "> "
-    # read
-    var line-storage: (stream byte 0x100)
-    var line/ecx: (addr stream byte) <- address line-storage
-    clear-stream line
-    read-line-from-real-keyboard line
-    var done?/eax: boolean <- stream-empty? line
-    compare done?, 0/false
-    break-if-!=
-    # parse
-    var env-storage: environment
-    var env/esi: (addr environment) <- address env-storage
-    initialize-environment env
-    {
-      var done?/eax: boolean <- stream-empty? line
-      compare done?, 0/false
-      break-if-!=
-      var g/eax: grapheme <- read-grapheme line
-      process env, g
-      loop
-    }
-    # eval
-    var stack-storage: value-stack
-    var stack/edi: (addr value-stack) <- address stack-storage
-    initialize-value-stack stack, 0x10
-    evaluate-environment env, stack
-    # print
-    var empty?/eax: boolean <- value-stack-empty? stack
-    {
-      compare empty?, 0/false
-      break-if-!=
-      var result/xmm0: float <- pop-number-from-value-stack stack
-      print-float-decimal-approximate 0, result, 3
-      print-string 0, "\n"
-      print-string 0, "width: "
-      var width/eax: int <- float-size result, 3
-      print-int32-decimal 0, width
-      print-string 0, "\n"
-    }
-    #
-    loop
-  }
-}